You will limit your steering running a 10" wheel on the front with that subframe. A 9" with a 265 is a much better fit. but most of us will give up a tennie bit of lock to lock steering for them big ole tyres!

I'm not sure if my frame is a first gen, bought in spring of 2006 I believe.

I just drove the car yesterday with new 18 x 10 5.5 bs 275/40 tires and no problems, the big test will be pushing it at the track. Street driving so far no problems.

So with a 265 on a 9" front wheel, would a 6.25" bs be best?
Compared to 6.75"bs on a 10", it would take a 1/2" off both the inside and outside correct?

the green sped tech 69 camaro runns 10 with a 7" BS our new car runs a 9 with a 6 bs same tire size 275 30 20 on both cars, i think the 9 actuallu looks better with the 275 on it, if your doing a10 then i would look at a 285 or maqybe a 295 front wheel, you will probably have to do some steering stops, but Oh well.

What did you end up doing?

I have taken no action other than fit it up. I need to dive into my minitubs. When it comes time to replace the rear wheels tires, I'll decide if I change all 4 or just the rears. All depends on the cash flow situation in a few months...

Cool, I have the same subframe and am trying to figure out the best backspace for a 18X9" with a 275. I want the car to be prety low, and based on Franks recommendation of a 6.75"bs for your 10", I was thinking 6.25" for my 9" but I am having a hard time confirming this. So I was just checking to see if you got something to work. Thanks.

Based on the measurements the original poster came up with, I'd agree that a 9" with a 6.25" should work as well. Have you measured the distance from your rotor hat to the outer fender? What do you come up with?

Thanks Jon. Unfortunately the subframe is not in the car yet, it's sitting on jackstands.

Maybe Mikamaro would be so kind and take this measurement?

Ok, I put the whole thing together, swapped out the subframes and measured this. It is 5-5/16" from the hat to the unrolled fender lip.
Base on this measuremeant, to make the 18X9 with a 275 the same distance to the fender lip as the factory ralley with a 235, the BS needs to be 5.75". I am considering going 6.0" to give me a quarter inch more clearance because I am going to be pretty low.
Does this sound right?
http://i110.photobucket.com/albums/n...o/96f1b05a.jpg
http://i110.photobucket.com/albums/n...o/9cf49dd7.jpg
http://i110.photobucket.com/albums/n...o/5639e555.jpg